abactinal

About 0.01 uses per million words.

Meaning

1. adjective Pertaining to the surface or end opposite to the mouth in a radiate animal.
2. adjective Pertaining specifically to the echinoderm body, that part not bearing tube feet, in which appears the madreporite.

Similar words

actinal abaxial apodous aproctous actinogonidial acerous abchalazal radulate umbraculate adnate

Often followed by

plates surface area skeleton side and spines system view